CVE-2026-64682
AstroBlocks: Admin session tokens can be forged due to a hard-coded fallback JWT secret and a mismatched environment variable name
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
AstroBlocks is a block-first CMS for Astro projects. Prior to version 3.4.0, admin session tokens can be forged due to a hard-coded fallback JWT secret and a mismatched environment variable name. An attacker who knows the public fallback value (readable in the published package) can forge a valid session token with role: "owner" and obtain full administrative control of the CMS — creating/deleting content, users, media, redirects, and configuration. This issue has been patched in version 3.4.0.
| CWE | CWE-321 CWE-798 |
| Vendor | nauelg |
| Product | astro-blocks |
| Published | Nov 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
NauelG / astro-blocks
< 3.4.0
References
github.com: https://github.com/NauelG/astro-blocks/security/advisories/GHSA-mfcg-m7j5-7v72 github.com: https://github.com/NauelG/astro-blocks/pull/51 github.com: https://github.com/NauelG/astro-blocks/commit/fd83bf0b37a756363f718e134c16e448da09a74d github.com: https://github.com/NauelG/astro-blocks/releases/tag/v3.4.0